Safety lock for casement windows



17, 194@ H. H. KlsTNER SAFETY LOCK FOR CASEMENT WINDOWS I Filed July 15 .1957 2'? Sheets-Sheet l 152ml .Y

l ZM m@ /MZM m @RumA/15d sept' 17, 1940- H. H. KlsTNL-:R

SAFETY LOCK FOR CASEMENT WINDOWS Filed July 15, i937 3 Sheets-Sheet 2 me/who@ jive/man H. Kse/L sept 17, 1940 H. H. KlsTNER SAFETY LOCK FOR CASEMENT WINDOWS 5 Sheets-Sheet 3 Filed Jul-y ,15, 1937 Patented Sept. 17, 1940 UNITED STATES PATENT OFFECE 12' Claims.

This invention relates to safety locks for casement windows and other pivoted members which are provided With operating means comprising a screw and gear mechanism, and is particular- 1y adapted to the metal easement Windows commonly used for high buildings.

The invention aims toprovide a strong and secure key actuated locking means for preventing the window or other pivoted member from being opened sufciently to permit of entrance of a person therethrough while permitting limited opening for ventilation.v A further aimis to provide for locking the window in either closed or Ventilating position.

Other objects of the invention are to simplify and reduce the cost of applying adequate safety locks to existing window installations, and to improve the appearance and facilitate the operation of such devices. r

In the accompanying drawings illustrating preferred forms of the invention, .v

Fig. 1 isV a'horizontal cross-sectionthrough a metal easement window showing one form of my improved safety lock in plan, the extent of movement of the window in its flocked position being indicated in broken lines;

Fig. 2 is va part plan view and part horizontal cross-section o-n the line 2 2` `in Fig. 4 of the form of lock shown in Fig. 1, showing a portion of the window operating mechanism;

Figs. 3 and 4 are vertical cross-sections of the same on the lines 3-3 in Fig. 1 and 4-4 in Fig. 2, respectively;

Figs. 5; 6 and 7 illustrate a modified form of safety lock having al rotating barrel type of locking means, Fig. 5 being a plan view;

Fig. 6 is a vertical cross-section of the form of lock shown in Fig. 5, on the line 6 6 therein, looking in the directionv of the arrows; and

Fig. '7 is a plan of part of the operating arm and locking cam showing them in wide open position of the window;

Fig. 8 is a plan View of a modified form of safety lock having provision rfor dead locking the window in closed and in Ventilating positions, as desired, showing the partsdead locked in closed position of the window;

Fig. 9 is a plan view of the form of lock illustrated in Fig. 8, showing the parts dead locked in Ventilating position of thel window;

Fig. 10 is a cross-sectional View similar to Fig. 3 of a modiecl form of lock adapted for application to existing types of metal window operating installations;

class residences and office Fig. 11 is a plan View of the bodyonlyof the I showing modified forms of the invention;

Fig. 14 is a plan View of the body only of the y locking device illustrated in Fig. 13;

Fig. 15 is a cross-section of the locking device illustrated in Fig. 13 taken on the line I5-I5 therein, looking in the direction of the arrows; and

Fig. 16 is a perspective View of the locking member of the form of device illustrated in Figs. 13, 14 and 15.

In the form of device shown in Figs. 1 to 4, the safety lock is built into the window operating mechanism in such manner as to permit the window to be opened through a narrow angle for Ventilating purposes, and closed at will, even when locked, but preventing wider opening from either the inside or outside without use of the key.. The window illustrated is of the outwardly swinging metal sash type, the sash frame Il being pivoted at top and bottom upon a pair of brackets I2 xed to the window frame I3 above and below the window opening. The window sash is swung open and shut by means of an operating arm I4 made of hardened steel and pivoted at one end on a stud I5 in a. housing I6 xed on the inner or room side of the window sill or sill memberof the frame I3.' The outer end. of the operating arm I4 carries a button or slide member I'l which fits into a channel I8 secured on the under side of the Window frame II. The edges of this channel member are turned in to embrace the grooved neck of the button I'I, as shown in Fig. 3, so that the free end of the arm is slidably secured to the Window frame in all positions thereof, and cannot be separated therefrom without removing the housing IS, which is held in place by non-removable metal CII drive screws or other suitable means not easily lattacked by means available to a burglar.

rThe operating arm is provided at its pivoted yend with a gear sector I9, and is controlled by means of a screw or worm 20 mounted on the end of a short shaft 2| journalled in the housing I6. The outer end of the shaft 2! carries an operating crank 22 provided with a rotatable handle 23, the crank being secured to the shaft by a set screw or in any suitable manner. By rotating the crank, the arm is caused to swing and thereby the window is opened and closed.

Windows of this type are customarily provided with a latch or catch for retaining them in closed position, but this catch does not function whe-n the window is partly open, and if the window is open far enough to permit a persons hand to be inserted from without, the crank 22 may be rotated and the window opened Wide.

My locking device comprises a key actuated locking bolt 25, of the type shown and described in my pending application Ser. No. 41,115, which is mounted in a cylindrical boss or casing portion 26 of the housing I6, as shown in Figs. 3 and 4. The inner end of the bolt has a hardened portion 21 which is adapted to be protruded into a slot 29 in the gear sector IS, to prevent more than a restricted angular turning movement of the gear and arm I4. A spring 29 retains the bolt 25 with the projection 27 out of engagement with the slot 28 when the bolt is unlocked, as is well understood in sliding bolt locks of this type, that illustrated having a plurality of discs or tumblers 39 under control of the key which engage in suitable spaced recesses 3i in the bolt receiving sleeve 32 to retain the bolt in locking and unlocked position, respectively, thereby deadlocking it.

The bolt may be moved only by means of the key inserted in the axial slot in its outer end, as illustrated in Figs. 3 and 4, and is guided in its movement by a pin 33 in its side which engages i-n an L-shape slot 34 in the sleeve 32, the bolt and sleeve assembly being retained in the'housing 26 preferably by spinning over the end of the housing to embrace the end of the sleeve, as shown in said figures.

The pitch of the screw 26 is such that the mechanism is non-reversible, that is, the screw will turn the sector but the sector will not turn the screw, whereby it will hold the window in adjusted position without other securing means, the wind and other forces tending to swing the window having no eiect in turning the screw, and thus the window may be set in any adjusted position within the range of movement permitted by the length of the slot 28 when the bolt is in locking position. In the device illustrated in Figs. 1 to 4, this range of movement is indicated by the arc marked with the arows 35.

The locking device illustrated in Figs. 5, 6 and 7 is applied to the same general style of casement window operating mechanism as shown in Figs. 1 to 4, wherein the window operating arm I4 is pivoted on a stud I5 in a housing 36 similar to the housing I6 excepting that it is made in two parts, the upper of which is provided with the casing 3l which holds the rotatable barrel or plug 38 containing the locking discs or tumblers. The inner end of the barrel 38 is provided with a plate or cam 39 which has a detent portion 40 adapted to engage the bent up tongue 4| in the edge of the gear sector I9. The back edge 42 of the detent portion of the cam 39 is adapted to abut against a fixed stopv 43 on the under side of the top part of the housing 36, as shown in Fig. 7, thereby preventing turning of the barrel too far when the key is used to unlock the Window.

The screws 44 which secure the lower part of the housing 36 to the window sill are covered and secured in place by the top part of the housing, which in turn is held in place by screws 45 or other suitable means. All of the operating parts of the mechanism are preferably attached to the top part of the housing 36, so that all may be removed and replaced together as a unitary assemblage.

In the modied form of locking plate and gear sector illustrated in Figs. 8 and 9, the plate 46 vdeadlocked positions.

on the lower end of the rotatable locking barrel or plug is provided with two detents, 41, 48, the rst one of which engages with a notch or shoulder 49 on the gear sector I9, to hold the latter in closed position of the window, as shown in Fig. 8. 'I'he other detent 48 is arcuate in form to t into a corresponding recess 53 in the gear sector I9 to hold the latter in Ventilating position of the window, as shown in Fig. 9, the two engaging positions of the locking barrel being at about apart and corresponding to two of its A third deadlocked position is provided at from the closed locking position in which the locking barrel may be left to permit free operation of the window opening mechanism. i l

In the forms of the invention illustrated in Figs. 10 to 16, inclusive, the window may be locked rigidly in any one of a series of positions determined Vby the rotation of the operating handle, vwhich is provided with a deadlocking means for holding it fast in each lowermost position of rotation. This form of device may be applied to existing easement Window installations by removing the operating crank from the end of the shaft 2| and substituting .a crank 66 having provision within its handle end 6I for a locking bolt 62, the hardened extremity of which engages in a recess 63 in a keeper block 64 which has an upstandingarm provided with a bearing 65 for the crank to turn in, and which is secured to the window sill adjacent the housing I0 for the window .operating` mechanism in any suitable manner.

In the form of device illustrated, the keeper block is secured in place by screws 66, one of which is positioned beneath the locking position of the crank handle where it cannot be removed when the handle is locked. Thev screws or pins 61 which secure the crank 66 on the shaft 2I A are inserted through a hole 68 in the side of the bearing 65, so located that these screws or pins cannot be removed when the handle is locked. Thereby the crank handle and locking mechanism are fixedly secured in place and cannot be removed when the handle is locked in position.

The form of the invention shown in Figs. 10 and 11 .comprises a boli-,locking sleeve 32 and assembled parts similar to the locking sleeve and bolt assembly illustrated in Figs. 3 and 4, which are secured to the handle 6I by means of a screw 69 passing through one side wall in such position that it cannot be removed when the handle is locked.

A knurled or otherwise finished sleeve 'I9 is rotatably mounted on the hollow handle 6I for` a hand or. linger hold, to make it easy to rotate the handle. This sleeve is preferably secured in place by spinning over the end of the handle.

The form of device illustrated in Fig. 12 is similar to that shownin Figs. 10 and 11, with respect to its general construction and mode of operation, the devices being alike except for the locking bolt 'II and associated parts, which are more rugged. The bolt is shot into locking position by rotating the tumbler barrel "I2, which has a squared end I3 having a sliding fit in a squared recess in the bolt, causing the two to turn together, a pin I4 secured in the handle15 and projecting into a spiral groove 'I6 on the bolt operating ,to move the bolt in one or the other direction, depending on the direction in which the barrel is turned.

Another modification of the. invention is shown in Figs. 13, 14, 15 and 16 wherein the locking bolt 80 is rotatable in the hollow handle 8l of the crank arm, but is not axially movable as in the other forms of the invention. The inner end of the bolt is provided with a cross bar 8,2, which in one position engages between quarter segments 83' on the keeper member 84, which may be secured to the Window sill or frame in any suitable manner to hold it rigid. By turning the bolt through 90 in the direction away from the adjacentfaces of thesegments 83, the cross bar is'shifted to permit it to move endwise between the segments as the handle is rotated in either direction, thereby permitting opening or vclosing movement of the window. Two pairs of opposed slots 85 are made in the hollow wall of the handle 8l upon diameters at right angles to each other to receive the locking tumblers 86 in one or the otherV position of 'rotation of the bolt. A pin 81 in the hollow wall of the handle, projects into a groove 88 encircling the bolt and holds it in place against lengthwise movement while' permitting rotation at will.

The tumblers and key nibs can be changed to provide a large number of' combinations as is wellfknown in this type of multiple tumbler lock, and in supplying a set of locks for a house or single apartment, all would be provided with the same key combination, so as to enable the same key to operate all of the locks of the set.

It is obvious that changes inthe designs may be made to suit diierent types of windows and frames, and to adapt the invention to other types of operating mechanism, and the invention is not restricted to the details of construction shown in the drawings.

In the claims, the word Window is used broadly to include both vertically and horizontally swung windows, doors, shutters, hatches and similar closure members to which the invention is applicable.

I claim the following as my invention:

1. A locking device for windows having operating means for opening and closing the movable sash including a pivoted member and manually operable non-reversible means for rotating it, said locking device comprising a lock-housing and a locking member mounted for movement therein, said locking member having a detent portion adapted in deadlocked position to engage said pivoted member and prevent rotation thereyof in the direction toopen said window, and key controlled means operable from without said housing for deadlocking said lockingvmember.

2. A locking device for windows having operating means for yopening and closing the movable sash including a pivoted member and manually operated worm and sector means for rotating it and for holding it in adjusted position, said locking device comprising a lock housing and a locking member protected by said housing and mounted for movementtherein, said locking member having anv end portion adapted to be held in deadlocked position in juxtaposition to said sector to prevent rotation thereof in the direction to open said window, and key controlled means for deadlocking said locking member.

3. A locking means for preventing undue opening movement of a pivoted window having an operating arm provided with a sector, said locking means comprising an elongatedslot in said sector, and an endwise movable bolt adapted to engage in said slot to limit movement of said sector in both directions.

4. A safety locking means for preventing undue opening movement'of a pivoted window having an; operating arm provided with ya sector, an elongated slot `in said sector,.said locking means f comprising and an endwise movable bolt adapted to be projected to engage in said slot to limit movementof said sector in both directions, said bolt being provided'with key operated dead'-A locking means for projecting it and locking itin projected position to engage said slot.

`5. A locking device for windows having operating means for opening and closing the movable sash including a pivoted member and worm and sector means for rotating it and for holding it in adjusted position, said locking device comprising a lock housing and a locking member mounted for vmovement therein, said locking member having a portion `adapted in one deadlocked position to engage 4with said sector to prevent rotation of said pivoted member inthe direction -to open said window, land. a portion adapted in another deadlocked position to engage,`with said sector to prevent rotation ofsaid vpivoted member in either direction` tohold said window in Ventilating position.

6. A locking device for windows having operating meansvfor opening and closing the movable sash including a pivoted arm and means for rotating it, said locking device comprising a lock housing and a tumbler barrel mounted for movement therein, said tumbler barrel having an end portion adapted to be held in deadlocked position in juxtaposition to said arm to prevent rotation thereof in the direction to open-said window, and tumbler means for deadlocking said tation thereof in the direction to open said Win-l dow, and a portion adapted in another deadlocked position to engage with said pivoted member to prevent rotation thereof in either direction to hold said window in Ventilating position.

8. A locking device for windows having operating means for opening and closing the movable sash including a pivoted member andcooperating means for rotating it and for holding it in adjusted position, said locking device comprising a lock housing and a locking member mounted for rotation therein, said locking member having a portion adapted to engage with said pivoted member to prevent rotation of the latter, and means for deadlocking said locking member to lock said window.

9. A locking device for windows having oper'- ating means for opening andgclosing the movable sash including a pivoted member and cooperating means for rotating it and for holding it in adjusted position, said locking device comprising a lock housing and a locking member mounted for rotation therein, said locking member having a portion adapted to engage with a cooperating portion of said pivoted member to prevent rotation of the latter in either direction, and vmeans for deadl'ocking said locking member to lock said window in adjusted position.

10. A locking device for windows having operating means for opening and closing the movable sash including a pivoted member and worm and sector means for rotating it and for holding it in adjusted position, said locking device comprising a lock housing and a locking member mounted for. rotation therein, said locking member having a portion adapted to engage with said sector to prevent rotation of said pivoted member and carrying means for deadlocking said locking member in the sector engaging position.

11. A locking device for casement Windows lhaving an operating device for opening and closing the movable sash including a pivoted arm and manually operable means for rotating it, said locking device comprising a housing and a bolt mounted for axial movement therein and inaccessible for manipulation by the mgers, said bolt having an inner portion engaging With said arm in dead-locked position to restrict rotation thereof in the direction to open said Window and an exposed end slotted to receive a mating key, and means responsive to a mating key for dead-locking said bolt in arm-engaging position,

whereby insertion of .theproperkey enables lsaid bolt to be moved thereby.

12. A locking device for Casement Windows having an operating device for opening and closing -the movable sash including a pivoted arm and manually operable .means for rotating it, said locking device comprising a housing and a bolt mounted for movement therein intoproximity With said pivoted arm, said bolt being protected bysaid housing from manipulation by the iingers, means cooperating with said housing for dead-locking said bolt in moved position, and means associated With said bolt for engaging with said arm in dead-locked position of the former to restrict rotation of the latter in the i direction to open said Window, the outer end of said bolt being provided With` an opening to rel HERMAN I-I. KISTNER. 

